Dash Express

You are always on the Internet, so why shouldn't your GPS be? Read on for a review of the Dash Express GPRS-connected GPS system.

I spend a lot of time in my car. Like a fair number of people who work in
the San Francisco Bay Area, I commute a long distance—in my case, 60 miles
one way. I've learned to time my commute to avoid the worst of the traffic,
but I still spend about three hours each day in my car. I've tried
different GPS (Global Positioning System) units here and there, but because
most of my time in the car is spent going to the same place, I don't
typically need a lot of driving directions. A GPS would sit unused
only until I travel or go to a new restaurant, which is only every once in
a while.

Introduction to the Dash Express

Now, I like gadgets at least as much as the next Linux geek, so when I first
heard about the Dash Express GPS, I instantly was intrigued. Basically, Dash
has created a new GPS unit aimed at the commuter market. This GPS adds a
GPRS cellular connection, so that it has an always-on Internet connection
while you drive. The Internet connection can be used to get new software
updates and maps, but one of the main selling points for the Internet
connection is improved traffic, routing and search data. The Dash network
keeps track of each GPS unit anonymously and combines its data with
traffic sensors and other data points to gauge up-to-the-minute traffic
data it then shares with each Dash user.

The Internet connection also allows the Dash Express to source other
Internet services when you do a search. Along with the built-in database of
locations of interest, you also can search Yahoo for anything from the
closest coffee shop to the best sushi place nearby, as Yahoo searches not
only return locations but also ratings for each result.

One of the most interesting aspects of the Dash for me and other
Linux users is the open-source nature of the device. For one, the hardware
itself runs Linux. The hardware is actually similar to what is being used
in the OpenMoko cellphones. In addition, Dash has opened its API, so
interested parties can register as developers and write their own
applications to run on the Dash Express. Later in this review, I talk
about my own experience writing a Dash application.

Pricing

Of course, the GPS unit and cellular connection aren't free. The Dash
Express currently retails for $299 and includes three months of free
cellular connection. After that, the cellular connection costs $12.99 with
a month-to-month contract, $10.99 per month with a one-year contract and
$9.99 per month with a two-year contract. If you choose not to renew the
cellular connection, the unit still functions like a standard GPS, but you
no longer will be able to use Send2Car, Dash applications, Yahoo searches
and other features that require the Internet.

Standard GPS Functions

Although the Internet features might seem cool, a GPS device still needs to be
able to find your destinations and route you there correctly. Plus, if you
don't renew the cellular connection, you'd like to know that the device
still would be useful. First, though, let me point out the elephant in the
room. One of the first things you will notice about the Dash Express is
that it is big compared to other modern GPS devices
(4.8"Wx4.1"Hx2.8"D and 13.3 ounces). Although the face of the device is about
the same size as other devices, it's as thick as the Garmin GPSes from a few
generations ago. Along with its thickness, the top of the device actually
extends back a few inches in a sort of L shape and houses the speaker.
Unfortunately, this means you won't be storing the Dash Express in your
pocket or possibly even in a small glove compartment.

The installation is pretty straightforward, and out of the box, the device
will connect to a cellular network (or open Wi-Fi access point) for any
Internet features. The interface itself is simplified compared to some
other GPS units and relies almost entirely on the touchscreen for input,
apart from a physical menu and volume button on the top of the device. When
you calculate a route, you will see and hear turn-by-turn directions from
the main map screen. The interface is pretty clean (Figure 1) with most of
the screen taken up by the map.

Figure 1. Dash Express Interface

As a standalone GPS, the Dash is so-so. A few times I searched for a
business only to find that when I got there it was out of business. The
routing isn't entirely perfect either and seems to favor larger
highways and more direct routes, even if they are slower. My town has four
different exits on the highway, but even though the first exit is the
fastest, the Dash always routed through a different exit. There is a
particularly bad bottleneck along my commute that occasionally backs up for
miles. There's an alternate route to my house right before the bottleneck
that normally takes longer except when there is very heavy traffic at the
bottleneck, but the Dash seemed unaware of this as an alternate route.

The Dash does appear to be dealing with the routing issues actively. You can
report a problem directly from the device, and it will tar up all of its
logs and other information about your current location and send it off
to Dash via the cell connection. Once you get home, you will see an e-mail
response in your inbox, and you can go to Dash's Web site to fill out the details
of your problem. I did, in fact, report an issue with routing around the
bottleneck, and Dash was quick to respond. Apparently, the next iteration of
its map and routing internally does not have the issue, so presumably my
problem will be fixed at the next update.

Kyle Rankin is a director of engineering operations in the San Francisco Bay Area, the author of a number of books including DevOps Troubleshooting and The Official Ubuntu Server Book, and is a columnist for Linux Journal.

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